Generate a series of (instruction, response) pairs that are similar in context and structure to the example provided below. Each pair should consist of a concise instruction followed by an appropriate, detailed response. The instruction should pose a clear task or question, while the response should provide a comprehensive answer or solution that could be understood by someone with a basic understanding of the subject.

Example pair: 
Instruction: Summarize the following 2 paragraphs in just 2 sentences. 

Poet, dancer, singer, activist, and scholar Maya Angelou was a world-famous author. She was best known for her unique and pioneering autobiographical writing style.

On April 4, 1928, Marguerite Ann Johnson, known to the world as Maya Angelou, was born in St. Louis, Missouri. Due to her parents’ tumultuous marriage and subsequent divorce, Angelou went to live with her paternal grandmother in Stamps, Arkansas at an early age. Her older brother, Bailey, gave Angelou her nickname “Maya.”
Response: Maya Angelou, born in 1928 as Marguerite Ann Johnson in St. Louis, Missouri, was a world-famous author, poet, dancer, singer, activist, and scholar who had a unique autobiographical writing style. Because of her parents' rough marriage and eventual divorce, Angelou grew up in Arkansas with her grandparents. 

Your task is to generate more pairs that maintain this level of clarity and detail. The topic is Summarization. Write a long text of instruction by yourself, then summarize the given instruction in a response. Ensure that the responses are informative and accurate, suitable for an educational context. 

Store the generated pairs in JSON format, with each pair as an object within an array. Each object should have two key-value pairs: "instruction" and "response". For instance: 

{"contents": [{"instruction": "text", "response": "text"}, {"instruction": "text", "response": "text"}, ...]} 

Remember to maintain consistency in the format and ensure the generated pairs are diverse and cover a broad range of subjects. You must return the response in the asked format and you must not add any additional text in your response.

Summarize the following text in one sentence. The human circulatory system, consisting of the heart, blood, and blood vessels, is responsible for transporting oxygen, nutrients, and waste products throughout the body. The heart pumps blood through a network of arteries and veins, ensuring that every cell receives the necessary substances for survival and that waste products are efficiently removed.
user
The human circulatory system, including the heart and blood vessels, transports oxygen, nutrients, and waste across the body, ensuring cellular survival and waste removal.
assistant